What are my odds???

Hey fellow rollers! I hope this isnt a stupid question.
I've got an indoor hydroponic garden. I started with 15 bagseeds, from some REALLY GOOD bags. I ended up with 7 healthy plants. 4 sativas and 3 indicas.
I vegged for 3 or 4 months, and am now 10 days into flowering. Three males have showed their ugly ballsacks. I've killed the ballsack bearers, and now have my last 4 babies in an ebb and flow system.
My question is this... What are my odds for the last 4? I've read from some of the gurus of this fine site, that the males show their sex first. I understand that there's no way to determine sex, until they spit pistils. Im just trying to find out if their MORE THAN LIKELY female seeing as how I've had 2 indicas, and 1 sativa(The males) already show their sex.
I'd post pictures, but theres nothing to see. It's just 3 sativas, and 1 indica plant, and none of them are showing sex.
AGAIN!!! Im not asking for psychic premonitions... Im simply asking, FROM YOUR EXPERIENCE, seeing as how I've already had 3 males show their balls, are my chances good for the surviving 4?
Thanx in advance for any and all help!

well normally males show sex first, so you should be stoked.

yeah man, i would say that they're good. but plan on getting 1 more male out of the bunch. i say this because then you wont be so disappointed if it does happen, and if it doesnt then you'll be even happier.

i find it a lil hard to believe that a plant that has been in veg for three of four months hasn't shown any kind of preflowers by now... i maybe crazy, but i would've thought that you would have seen some pre-flowers after that amount of vegetive growth... and the first poster is right about males usually showing sex first, so i would think that you have some pretty good odds of the others being chics..
best of luck with your grow though

Thanx alot, guys. I was hoping that was the case. If you wanna' check back, I'll post some pics in a few weeks to show some of the bud formations I get. I like my little garden. It has four completely different strains in one garden. I think it'll look really cool about 2 months from now.

@ racerboy71... I was, as well. This is my first grow, and from what I've read here, and from other sources, I should've seen some type of pre-flowers. I'm not sure what I did to the environment to prevent that from happening, but none did.

It may have been the fact that I vegged them with fluorescents, and kept them VERY close to the tops for most of their vegging.(It's a basement grow, and height is an issue. I kept the lights close to keep them short.) Im not sure if having those lights that close did it, or whether it was the type of light bulbs I used. I vegged them with six 4-foot, 40W fluoros. I used 3 warm white and 3 cool white bulbs.(learned that from the Mr. Green video.)

Either way, they're healthy, and they're ready to throw me some NASTY buds! I can't wait. HOPEFULLY they all turn out to be ladies.

Thanx again , guys!